This patchset is a third one in the series created in the framework of my Baikal-T1 PCIe/eDMA-related work: [1: Done v5] PCI: dwc: Various fixes and cleanups Link: https://lore.kernel.org/linux-pci/20220624143428.8334-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ Merged: kernel 6.0-rc1 [2: Done v4] PCI: dwc: Add hw version and dma-ranges support Link: https://lore.kernel.org/linux-pci/20220624143947.8991-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx Merged: kernel 6.0-rc1 [3: In-review v7] PCI: dwc: Add generic resources and Baikal-T1 support Link: ---you are looking at it--- [4: Done v6] dmaengine: dw-edma: Add RP/EP local DMA support Link: https://lore.kernel.org/linux-pci/20221107210438.1515-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ Note it is very recommended to merge the patchsets in the same order as they are listed in the set above in order to have them applied smoothly. Nothing prevents them from being reviewed synchronously though. Originally the patches submitted in this patchset were a part of the series: Link: https://lore.kernel.org/linux-pci/20220503214638.1895-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ but due to the reviewers requests the series was expanded to about 30 patches which made it too bulky for a comfortable review. So I decided to split it up into two patchsets: 2. and 3. in the table above. Regarding the series content. This patchset is mainly about adding new DW PCIe platform support - Baikal-T1 PCIe of DW PCIe v4.60a IP-core. But a set of feature-reach preparations are done first. It starts from converting the currently available DT-schema into a more flexible schemas hierarchy with separately defined regs, clocks, resets and interrupts properties. As a result the common schema can be easily re-used by all the currently available platforms while the named properties above can be either re-defined or used as is if the platforms support they. In the framework of that modification we also suggest to add a set of generic regs, clocks, resets and interrupts resource names in accordance with what the DW PCIe hardware reference manual describes and what the DW PCIe core driver already expects to be specified. Thus the new platform driver will be able to re-use the common resources infrastructure. Link: https://lore.kernel.org/linux-pci/20220324013734.18234-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ Changelog v2: - Rename 'syscon' property to 'baikal,bt1-syscon'. (@Rob) - Move the iATU region selection procedure into a helper function (@Rob). - Rebase from kernel v5.17 onto v5.18-rc3 since the later kernel has already DT bindings converted. (@Rob) - Use 'definitions' property instead of the '$defs' one. It fixes the dt-validate error: 'X is not of type array.' - Drop 'interrupts' and 'interrupt-names' property from being required for the native DW PCIe host. - Evaluate the 'snps,dw-pcie-common.yaml' schema in the 'socionext,uniphier-pcie-ep.yaml' DT-bindings since the later has platform-specific names defined. Link: https://lore.kernel.org/linux-pci/20220503225104.12108-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx Changelog v3: - Split up the patch "dt-bindings: PCI: dwc: Define common and native DT bindings" into a series of modifications. (@Rob) - Detach this series of the patches into a dedicated patchset. - Add a new feature patch: "PCI: dwc: Introduce generic controller capabilities interface". - Add a new feature patch: "PCI: dwc: Introduce generic resources getter". - Add a new cleanup patch: "PCI: dwc: Combine iATU detection procedures". - Add a method to at least request the generic clocks and resets. (@Rob) - Add GPIO-based PERST# signal support to the core module. - Redefine Baikal-T1 PCIe host bridge config space accessors with the pci_generic_config_read32() and pci_generic_config_write32() methods. (@Rob) - Drop synonymous from the names list in the common DT-schema since the device sub-schemas create their own enumerations anyway. - Rebase onto kernel v5.18. Link: https://lore.kernel.org/linux-pci/20220610085706.15741-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ Changelog v4: - Drop PCIBIOS_* macros usage. (@Rob) - Add "static const" to the dw_pcie_ops and dw_pcie_host_ops structure instances. (@Bjorn) - Rename bt1_pcie_dw_ops to bt1_pcie_ops. (@Bjorn) - Rename bt1_pcie_ops to bt1_pci_ops. (@Bjorn) - Use start_link/stop_link suffixes in the Baikal-T1 PCIe start/stop link callbacks. (@Bjorn) - Change the get_res() method suffix to being get_resources(). (@Bjorn) - Change *_{add,del}_dw_port() method to *_{add,del}_port(). (@Bjorn) - Drop dma_coerce_mask_and_coherent() applied to the PCI host bridge kernel device instance. (@Bjorn) - Add the comment above the dma_set_mask_and_coherent() method usage regarding the controller eDMA feature. (@Bjorn) - Fix the comment above the core reset controls assertion. (@Bjorn) - Replace delays and timeout numeric literals with macros. (@Bjorn) - Convert the method name from dw_pcie_get_res() to dw_pcie_get_resources(). (@Bjorn) - Rebase onto the kernel v5.19-rcX. Link: https://lore.kernel.org/linux-pci/20220728143427.13617-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ Changelog v5: - Add a note about having line-based PHY phandles order. (@Rob) - Prefer 'pcie[0-9]+' PHY-names over the rest of the cases. (@Rob) - Drop generic fallback names from the Baikal-T1 compatible property constraints. (@Rob) - Define ordered {reg,interrupt,clock,reset}-names Baikal-T1 PCIe properties. (@Rob) - Drop minItems from the Baikal-T1 PCIe clocks and reset properties, since it equals to the maxItems for them. - Drop num-ob-windows and num-ib-windows properties constraint from Baikal-T1 PCIe bindings. (@Rob) - Add a note about having line-based PHY phandles order. (@Rob) - Prefer 'pcie[0-9]+' PHY-names over the rest of the cases. (@Rob) - Add platform-specific reg/interrupt/clock/reset names to the generic schema, but mark them as deprecated. - Add new patches: dt-bindings: visconti-pcie: Fix interrupts array max constraints dt-bindings: imx6q-pcie: Fix clock names for imx6sx and imx8mq - Move the patch: PCI: dwc: Introduce dma-ranges property support for RC-host from the previous patchset in here. (@Bjorn) - Rebase onto the kernel v6.0-rc2. Link: https://lore.kernel.org/linux-pci/20220822184701.25246-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ Changelog v6: - Add the Nvidia Tegra194-specific "p2u-[0-7]" phy-names too. (@DT-tbot) - Drop 'deprecated' keywords from the vendor-specific names. (@Rob) - Move the common *-names definitions to the RP/EP schemas. Thus drop the 'definitions' property usage from the DT-schemas. (@Rob) - Move the DMA-mask setup to the eDMA driver. (@Robin) - Rebase onto the kernel v6.1-rc3. Link: https://lore.kernel.org/linux-pci/20221107204934.32655-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ Changelog v7: - Replace if-then-dev_err_probe-return statement with just return-dev_err_probe one in the pcie-bt1 driver. - Get back device.of_node pointer to the dw_pcie_ep_init() method. (@Yoshihiro) - Drop the dtschema tool 'lib.py' fix chunk from under the '---' pattern. (@Yoshihiro) - Move the allOf clause to the bottom of the fsl,imx6q-pcie.yaml bindings. (@Krzysztof) - Get back the names to the clock-names property and make sure the platform-specific cloc-names constraint is applied in the allOf clause in the fsl,imx6q-pcie.yaml bindings. (@Rob) Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> Cc: Alexey Malahov <Alexey.Malahov@xxxxxxxxxxxxxxxxxxxx> Cc: Pavel Parkhomenko <Pavel.Parkhomenko@xxxxxxxxxxxxxxxxxxxx> Cc: "Krzysztof Wilczyński" <kw@xxxxxxxxx> Cc: Frank Li <Frank.Li@xxxxxxx> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> Cc: caihuoqing <caihuoqing@xxxxxxxxx> Cc: Vinod Koul <vkoul@xxxxxxxxxx> Cc: linux-pci@xxxxxxxxxxxxxxx Cc: devicetree@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Serge Semin (20): dt-bindings: imx6q-pcie: Fix clock names for imx6sx and imx8mq dt-bindings: visconti-pcie: Fix interrupts array max constraints dt-bindings: PCI: dwc: Detach common RP/EP DT bindings dt-bindings: PCI: dwc: Remove bus node from the examples dt-bindings: PCI: dwc: Add phys/phy-names common properties dt-bindings: PCI: dwc: Add max-link-speed common property dt-bindings: PCI: dwc: Apply generic schema for generic device only dt-bindings: PCI: dwc: Add max-functions EP property dt-bindings: PCI: dwc: Add interrupts/interrupt-names common properties dt-bindings: PCI: dwc: Add reg/reg-names common properties dt-bindings: PCI: dwc: Add clocks/resets common properties dt-bindings: PCI: dwc: Add dma-coherent property dt-bindings: PCI: dwc: Apply common schema to Rockchip DW PCIe nodes dt-bindings: PCI: dwc: Add Baikal-T1 PCIe Root Port bindings PCI: dwc: Introduce dma-ranges property support for RC-host PCI: dwc: Introduce generic controller capabilities interface PCI: dwc: Introduce generic resources getter PCI: dwc: Combine iATU detection procedures PCI: dwc: Introduce generic platform clocks and resets PCI: dwc: Add Baikal-T1 PCIe controller support .../bindings/pci/baikal,bt1-pcie.yaml | 168 +++++ .../bindings/pci/fsl,imx6q-pcie.yaml | 46 +- .../bindings/pci/rockchip-dw-pcie.yaml | 4 +- .../bindings/pci/snps,dw-pcie-common.yaml | 266 ++++++++ .../bindings/pci/snps,dw-pcie-ep.yaml | 212 ++++-- .../devicetree/bindings/pci/snps,dw-pcie.yaml | 260 +++++-- .../bindings/pci/toshiba,visconti-pcie.yaml | 7 +- drivers/pci/controller/dwc/Kconfig | 9 + drivers/pci/controller/dwc/Makefile | 1 + drivers/pci/controller/dwc/pcie-bt1.c | 643 ++++++++++++++++++ .../pci/controller/dwc/pcie-designware-ep.c | 29 +- .../pci/controller/dwc/pcie-designware-host.c | 47 +- drivers/pci/controller/dwc/pcie-designware.c | 262 +++++-- drivers/pci/controller/dwc/pcie-designware.h | 63 +- 14 files changed, 1796 insertions(+), 221 deletions(-) create mode 100644 Documentation/devicetree/bindings/pci/baikal,bt1-pcie.yaml create mode 100644 Documentation/devicetree/bindings/pci/snps,dw-pcie-common.yaml create mode 100644 drivers/pci/controller/dwc/pcie-bt1.c -- 2.38.1
